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An alternate coloration of the same image, the description being erroneously changed to "Interior of a blimp."
Early concept artwork of the Metropolis Zone.
Early concept artwork of the Metropolis Zone. Text refers to the Zone as "Sonic sweat shop."
Early concept of the Metropolis Zone. Windows can be seen.
Early concept art of the foreground for the Metropolis Zone.
Early concept of the background for the Metropolis Zone. Furnaces can be seen.
The unused diagonal elevators for the Metropolis Zone.
Concept of the diagonal elevators for the Metropolis Zone.
Concept of various elements in the Metropolis design
Concept of various elements in the Metropolis Zone. Drawn on STI letterhead.
Concept of various elements in the Metropolis Zone. Drawn on STI letterhead.
Concept of various elements in the Metropolis Zone.
Concept of various elements in the Metropolis Zone.
Concept of various elements in the Metropolis Zone.
Concept of the gears in the Metropolis Zone.
Concept of the gears in the Metropolis Zone.
A list of obstacles slated the Metropolis Zone, including those unused.
Early Metropolis Zone Act 1 map. Has diagonally slanted rotating steel drums. Very different from final. Only two things seem very similar to final; the general starting area's position, and the downward ramp leading to the Goal Plate area.
Early Metropolis Zone Act 2 map. Has giant crushers. Very different from final. The only recognizable areas are the immediate starting area and an area with a half-loop leading to a ramp in the top-left.
Another Metropolis Zone Act 2 map.
Early Metropolis Zone Act 3 map. Has a diagonal elevator.
Early Metropolis Zone Act 3 map. Features a horizontal spike obstacle, similar to the ones removed from Marble Zone.
Early may concept by Hirokazu Yasuhara showing the game's setting. It shows early versions of levels featured in the final game as well as some levels that never got through development. This map illustrates the Ancient Times.
Early may concept by Hirokazu Yasuhara. Sonic the Hedgehog 2 was going to have time travel in the story and would had the player travel to different time periods for each level around the island. This map illustrates the Medieval Times.
Early map concept by Hirokazu Yasuhara. This map features the altered Present Time after Dr. Eggman alters the past. To travel through time, Sonic had to find and activate hidden Warp Points.
Early map concept by Hirokazu Yasuhara. This map illustrates the Ruined Present, after Dr. Eggman took complete control over the island. Now every location has been turned into an industrial factory or city.
Miscellaneous documents
Gallery
Explanation of the sprite system.
List of sprites.
Task list from which Tom Payne worked with.
A more informal list of tasks Tom Payne had to do.
File dealing with the palette data of the game.
Information about a lava bubbling animation.
Information on the collision array of Sonic the Hedgehog 2.
More on the collision array.
More on the collision array.
More on the collision array.
More on the collision array.
More on the collision array.
A list determining which enemies go with which stage.
A document featuring a joke of Sonic brandishing a gun.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features the game's title screen.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Emerald Hill Zone.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. A composite shot to highlight the Emerald Hill Zone corkscrew. Many magazines cropped this down to a more appropriate size.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Chemical Plant Zone. Sonic and Tails being on different levels occurs in the prototype's rolling demo, but is trickier to pull off in the final game.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Chemical Plant Zone.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Aquatic Ruin Zone.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Aquatic Ruin Zone and Tails with an older AI script.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Hill Top Zone. In the final game, Tails cannot stand in the Gondola, which would also detach at the end of its line.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Oil Ocean Zone.
One of the first promotional images for Sonic 2, which was released during the summer of 1992. Features a shot of Oil Ocean Zone and a "ball release" switch - an axed feature.